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--------------------------------------------------------------------------
Debian Security Advisory DSA XXX-1 security@debian.org
http://www.debian.org/security/ Dann Frazier
XXXXX 8th, 2006 http://www.debian.org/security/faq
--------------------------------------------------------------------------
Package : kernel-source-2.6.8
Vulnerability : several
Problem-Type : local/remote
Debian-specific: no
CVE ID : CVE-2006-3741 CVE-2006-4538 CVE-2006-4813 CVE-2006-4997
CVE-2006-5174 CVE-2006-5619 CVE-2006-5649 CVE-2006-5751
CVE-2006-5871
Several local and remote vulnerabilities have been discovered in the Linux
kernel that may lead to a denial of service or the execution of arbitrary
code. The Common Vulnerabilities and Exposures project identifies the
following problems:
CVE-2006-3741
Stephane Eranian discovered a local DoS (Denial of Service) vulnerability
on the ia64 architecture. A local user could exhaust the available file
descriptors by exploiting a counting error in the permonctl() system call.
CVE-2006-4538
Kirill Korotaev reported a local DoS (Denial of Service) vulnerability
on the ia64 and sparc architectures. A user could cause the system to
crash by executing a malformed ELF binary due to insufficient verification
of the memory layout.
CVE-2006-4813
Dmitriy Monakhov reported a potential memory leak in the
__block_prepare_write function. __block_prepare_write does not properly
sanitize kernel buffers during error recovery, which could be exploited
by local users to gain access to sensitive kernel memory.
CVE-2006-4997
ADLab Venustech Info Ltd reported a potential remote DoS (Denial of
Service) vulnerability in the IP over ATM subsystem. A remote system
could cause the system to crash by sending specially crafted packets
that would trigger an attempt to free an already-freed pointer
resulting in a system crash.
CVE-2006-5174
Martin Schwidefsky reported a potential leak of sensitive information
on s390 systems. The copy_from_user function did not clear the remaining
bytes of the kernel buffer after receiving a fault on the userspace
address, resulting in a leak of uninitialized kernel memory. A local user
could exploit this by appending to a file from a bad address.
CVE-2006-5619
James Morris reported a potential local DoS (Denial of Service)
vulnerability that could be used to hang or oops a system. The seqfile
handling for /proc/net/ip6_flowlabel has a flaw that can be exploited to
cause an infinite loop by reading this file after creating a flowlabel.
CVE-2006-5649
Fabio Massimo Di Nitto reported a potential remote DoS (Denial of Service)
vulnerability on powerpc systems. The alignment exception only
checked the exception table for -EFAULT, not for other errors. This can
be exploited by a local user to cause a system crash (panic).
CVE-2006-5751
Eugene Teo reported a vulnerability in the get_fdb_entries function that
could potentially be exploited to allow arbitrary code execution with
escalated priveleges.
CVE-2006-5871
Bill Allombert reported that various mount options are ignored by smbfs
when UNIX extensions are enabled. This includes the uid, gid and mode
options. Client systems would silently use the server-provided settings
instead of honoring these options, changing the security model. This
update includes a fix from Haroldo Gamal that forces the kernel to honor
these mount options. Note that, since the current versions of smbmount
always pass values for these options to the kernel, it is not currently
possible to activate unix extensions by omitting mount options. However,
this behavior is currently consistent with the current behavior of the
next Debian release, 'etch'.
The following matrix explains which kernel version for which architecture
fix the problems mentioned above:
Debian 3.1 (sarge)
Source 2.6.8-16sarge6
Alpha architecture 2.6.8-16sarge6
AMD64 architecture 2.6.8-16sarge6
HP Precision architecture 2.6.8-6sarge6
Intel IA-32 architecture 2.6.8-16sarge6
Intel IA-64 architecture 2.6.8-14sarge6
Motorola 680x0 architecture 2.6.8-4sarge6
PowerPC architecture 2.6.8-12sarge6
IBM S/390 architecture 2.6.8-5sarge6
Sun Sparc architecture 2.6.8-15sarge6
The following matrix lists additional packages that were rebuilt for
compatibility with or to take advantage of this update:
Debian 3.1 (sarge)
fai-kernels 1.9.1sarge5
We recommend that you upgrade your kernel package immediately and reboot
the machine. If you have built a custom kernel from the kernel source
package, you will need to rebuild to take advantage of these fixes.
Upgrade Instructions
--------------------
wget url
will fetch the file for you
dpkg -i file.deb
will install the referenced file.
If you are using the apt-get package manager, use the line for
sources.list as given below:
apt-get update
will update the internal database
apt-get upgrade
will install corrected packages
You may use an automated update by adding the resources from the
footer to the proper configuration.
Debian GNU/Linux 3.1 alias sarge
--------------------------------
These files will probably be moved into the stable distribution on
its next update.
---------------------------------------------------------------------------------
For apt-get: deb http://security.debian.org/ stable/updates main
For dpkg-ftp: ftp://security.debian.org/debian-security dists/stable/updates/main
Mailing list: debian-security-announce@lists.debian.org
Package info: `apt-cache show <pkg>' and http://packages.debian.org/<pkg>
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